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A platform for research: civil engineering, architecture and urbanism
Deep-coverage trenchless arch dam foundation in hilly and mountainous areas and reinforcing method of deep-coverage trenchless arch dam foundation
The invention belongs to the technical field of hydropower engineering, and discloses a deep-coverage trenchless arch dam foundation in hilly and mountainous areas and a reinforcing method thereof, an arch dam site is determined by combining terrain, geological conditions and a hydropower engineering hub arrangement scheme, and the dam type is determined to be a hyperbolic arch dam by combining hydrology, hydraulic power, retaining dam functions and bearing requirements. Three underground diaphragm walls are arranged on the upstream, the middle and the downstream of the arch dam base; according to dam foundation stress, arch dam seepage capacity and seepage deformation prevention and control requirements, high-pressure jet grouting is adopted in an anti-seepage wall and the upstream and downstream edges, a dam foundation is comprehensively treated through a hydraulic grouting technology, and finally the dam foundation and a riverbed covering layer form a composite dam foundation to meet corresponding engineering technical requirements. The non-excavation technology and the grouting technology are adopted for the arch dam foundation, the excavation engineering amount of a dam foundation covering layer and the slope cutting engineering amount of the two banks are reduced, and the risks of instability and collapse of upstream and downstream bank slopes of a foundation pit, flood prevention and flood crossing in the construction period and the like are avoided in the implementation process.
本发明属于水电工程技术领域，公开了一种丘陵山区深覆盖非开挖拱坝坝基及其加固方法，结合地形、地质条件及水电工程枢纽布置方案确定拱坝坝址，结合水文、水力、拦水坝功能和承载要求确定坝型为双曲型拱坝，且在拱坝基座上、中、下游共设置三道地下连续墙；根据坝基应力和拱坝渗透量及防治渗透变形要求，在防渗墙内及上下游边缘采用高压旋喷灌浆，坝基采用水工灌浆技术综合处理，最终与河床覆盖层形成复合坝基以满足相应工程技术要求。本发明对拱坝坝基采用非开挖技术和灌浆技术，减小了坝基覆盖层开挖工程量和两岸削坡工程量，在实施中避免了基坑上下游岸坡失稳、坍塌以及施工期内防洪渡汛等风险。
Deep-coverage trenchless arch dam foundation in hilly and mountainous areas and reinforcing method of deep-coverage trenchless arch dam foundation
The invention belongs to the technical field of hydropower engineering, and discloses a deep-coverage trenchless arch dam foundation in hilly and mountainous areas and a reinforcing method thereof, an arch dam site is determined by combining terrain, geological conditions and a hydropower engineering hub arrangement scheme, and the dam type is determined to be a hyperbolic arch dam by combining hydrology, hydraulic power, retaining dam functions and bearing requirements. Three underground diaphragm walls are arranged on the upstream, the middle and the downstream of the arch dam base; according to dam foundation stress, arch dam seepage capacity and seepage deformation prevention and control requirements, high-pressure jet grouting is adopted in an anti-seepage wall and the upstream and downstream edges, a dam foundation is comprehensively treated through a hydraulic grouting technology, and finally the dam foundation and a riverbed covering layer form a composite dam foundation to meet corresponding engineering technical requirements. The non-excavation technology and the grouting technology are adopted for the arch dam foundation, the excavation engineering amount of a dam foundation covering layer and the slope cutting engineering amount of the two banks are reduced, and the risks of instability and collapse of upstream and downstream bank slopes of a foundation pit, flood prevention and flood crossing in the construction period and the like are avoided in the implementation process.
本发明属于水电工程技术领域，公开了一种丘陵山区深覆盖非开挖拱坝坝基及其加固方法，结合地形、地质条件及水电工程枢纽布置方案确定拱坝坝址，结合水文、水力、拦水坝功能和承载要求确定坝型为双曲型拱坝，且在拱坝基座上、中、下游共设置三道地下连续墙；根据坝基应力和拱坝渗透量及防治渗透变形要求，在防渗墙内及上下游边缘采用高压旋喷灌浆，坝基采用水工灌浆技术综合处理，最终与河床覆盖层形成复合坝基以满足相应工程技术要求。本发明对拱坝坝基采用非开挖技术和灌浆技术，减小了坝基覆盖层开挖工程量和两岸削坡工程量，在实施中避免了基坑上下游岸坡失稳、坍塌以及施工期内防洪渡汛等风险。
Deep-coverage trenchless arch dam foundation in hilly and mountainous areas and reinforcing method of deep-coverage trenchless arch dam foundation
一种丘陵山区深覆盖非开挖拱坝坝基及其加固方法
WANG XINGWU (author) / JIANG KAIYU (author)
2023-12-19
Patent
Electronic Resource
Chinese
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